The term "nerpa" refers to the Baikal seal, a unique species of freshwater seal found only in Lake Baikal, Siberia. These seals are well-adapted to their cold environment, with a thick layer of blubber and a streamlined body that allows them to swim efficiently. They primarily feed on fish and other aquatic organisms found in the lake. Nerpas are known for their distinctive spotted coats and can often be seen basking on the ice during winter months. They play a crucial role in the Baikal ecosystem, contributing to the balance of aquatic life. Conservation efforts are in place to protect these seals, as they face threats from habitat loss and climate change.